Spiral steel pipe in the factory should be done before the mechanical properties of the test and flattening test and flaring test, and to reach the requirements of the specification rules. Spiral steel pipe quality inspection methods: from the appearance of the judgment, that is, in the appearance of the inspection. Appearance inspection of welded joints is a simple and widely used inspection method, is an important element of product inspection, mainly to find the shortcomings in the appearance of the weld seam and the scale of error.
General investigation by the naked eye, with the standard sample, gauge and magnifying glass and other things to check. If the exterior of the weld shows flaws, the internal weld may have flaws. Physical methods of inspection: physical methods of inspection is the use of some physical phenomena to determine or check the method. Material or workpiece internal defects of the view, is generally the choice of nondestructive testing methods. Non-destructive testing are ultrasonic flaw detection, radiation flaw detection, immersion flaw detection, magnetic flaw detection, etc.
Fineness check: storage of liquid or gas welding containers, the weld is not fine flaws, such as penetrating cracks, porosity, slag, not weld through and loose arrangements, etc., available fineness test to find. Fineness check methods are: kerosene test, water test, water test, etc.